Revert "Expose AID_KEYSTORE"

Revert "Cryptographic security for MAX_BOOT_LEVEL"

Revert submission 1660531-max-boot-level-crypto

Reason for revert: broken test com.android.tests.odsign.OnDeviceSigningHostTest#verifyArtUpgradeSignsFiles on aosp-master on aosp_cf_x86_64_phone-userdebug at 7261517

Reverted Changes:
Ia3b968afc:Set earlyBootEnded before apex starts
Ia69891291:Expose AID_KEYSTORE
I12530cd13:Cryptographic security for MAX_BOOT_LEVEL

Bug: 184635938
Change-Id: Id02f63a794544d650abb95c8e7f201eea03391eb
Test: forrest run for the broken test